* {
    padding: 0;
    margin: 0;
}

div {
    .nav {
        width: 100%;
        height: 60px;
        background-color: black;
    }
    .nav-center {
        width: 1290px;
        height: 60px;
        margin: auto;
        background-color: black;
    }
    .nav-center img {
        width: 186px;
        margin-top: 7px;
    }
    .nav-center ul {
        width: 570px;
        height: 60px;
        display: inline-block;
        vertical-align: top;
    }
    .nav-center ul li {
        color: white;
        display: inline-block;
        height: 60px;
        width: 100px;
        text-align: center;
        line-height: 60px;
    }
    .nav-right {
        height: 60px;
        width: 230px;
        float: right;
        /* background-color: tomato; */
    }
    .nav-right-box {
        width: 100px;
        height: 30px;
        display: inline-block;
        background-color: white;
        border-radius: 15px;
        font-size: 14px;
        line-height: 30px;
        margin-top: 15px;
    }
    .nav-right-box img {
        width: 15px;
        float: right;
        margin-right: 10px;
    }
    .nav-right-box span {
        margin-left: 10px;
    }
    .nav-right>span {
        margin-left: 10px;
        color: white;
    }
}

.section {
    width: 1290px;
    height: 1800px;
    margin: auto;
    background-image: url(./img/img/img/作业2/bg.jpg);
    .section-comtent {
        width: 1000px;
        height: 295px;
        margin: auto;
        border: 1px solid black;
        background-color: white;
    }
}